/say message - Sends a message to people around you. (/ s)
/whisper name message - Sends a private message. (/ w)
/yell message - Sends a general message. (/ y)
/party message - Sends a message to your group. (/ p)
/raid message - Sends a message to your raid group.
/guild message - Sends a message to your guild.
/reply message - Sends the message to the last message that sent you. (/ r)
/ignore name - Adds a player to the ignore list.
/unignore name - Removes the player from the ignore list.
/emote message - Equivalent to / me in mIRC. (/ em)
/afk [message] - Switches to "away from keyboard" mode.
/dnd [message] - Switches to "do not disturb" mode.
/join channel - Join / create a chat channel.
/leave channel — Disconnects from the chat channel.